body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  background-color: #efefef;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

header {
  padding: 1rem;
  position: relative;
  color: #fff;
}

header .bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url(./feiyan.jpeg);
  background-position: center;
  background-size: 100%;
  z-index: -1;
  filter: brightness(0.5);
}

h1 {
  text-align: left;
  margin: .5rem 0;
}

h2 {
  margin: .5rem 0;
  padding: 3px 10px;
  border-left: .2rem solid #f60;
  border-bottom: 1px solid #efefef;
  position: relative;
}

.row {
  display: flex;
  justify-content: space-between;
  padding: 3px 0;
}

.card {
  background-color: #fff;
  padding: 1rem;
  margin: 10px 0;
}